Wrought processing of γ-TiAl alloys

The hot working behaviour of intermetallic titanium aluminide alloys was described. The microstructural evolution during hot working was systematically studied on a series of binary and technical alloys with aluminium contents ranging between 45% and 54%(mole fraction). Process regimes in terms of temperature and strain rate were identified which allow large strain hot working to be carried out, either by forging or extrusion, with the production of sound forgings. The major areas addressed in the paper are ingot structure and homogenization, factors determining hot working and recrystallization, ingot conversion, and secondary processing.

The hot working behaviour of intermetallic titanium aluminide alloys wasdescribed. The microstructural evolution during hot working was systematically studied on a seriesof binary and technical alloys with aluminium Contents ranging between 45 percent and 54 percent(mole fraction). Process regimes in terms of temperature and strain rate were identified which allowlarge Strain hot working to be carried out, either by forging or extrusion, with the production ofsound forgings. The major areas addressed in the paper are ingot structure and homogenization,factors determining hot working and recrystallization, ingot conversion, and secondary processing.